================
@@ -2678,6 +2684,23 @@ InstructionCost
VPExpressionRecipe::computeCost(ElementCount VF,
case ExpressionTypes::ExtNegatedMulAccReduction:
case ExpressionTypes::ExtMulAccReduction: {
bool Negated = ExpressionType ==
ExpressionTypes::ExtNegatedMulAccReduction;
+ if (isa<VPPartialReductionRecipe>(ExpressionRecipes.back())) {
+ auto *Ext0R = cast<VPWidenCastRecipe>(ExpressionRecipes[0]);
+ auto *Ext1R = cast<VPWidenCastRecipe>(ExpressionRecipes[1]);
+ auto *Mul = cast<VPWidenRecipe>(ExpressionRecipes[2]);
+ unsigned Opcode =
----------------
sdesmalen-arm wrote:
should (in-loop) `VPReductionRecipe` also consider a sub reduction?
(`TTI.getMulAccReductionCost` does not take an opcode at the moment)
https://github.com/llvm/llvm-project/pull/147302
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